The Under Armour Womens Base 4.0 Extreme Base Layer Half-Zip Long-Sleeve Pullover was designed to keep you warm in extreme cold. Made of a polyester/elasterell blend, this long-sleeve base layer features UA Scent Control Technology, a brushed-grid interior for heat-trapping performance, and a half-zip front for customization. 4-way stretch and raglan sleeves allow freedom of movement wherever the day takes you. The Under Armour Base 4.0 Pullover makes frigid adventures possible. Imported. Sizes: XS-2XL. Color: Black/Pitch Gray. Type: Base Layer Tops.